#! /usr/bin/env python3

import asyncio


async def hello():
    print("hello")
    await asyncio.sleep(3)
    print("world!")

async def say():
    print("start ...")
    await asyncio.sleep(2)
    print("end ...")

async def eat():
    print("吃早饭")
    await asyncio.sleep(2)
    print("休息")

async def main():
    await asyncio.gather(hello(), say(), eat())


asyncio.run(main())
